body,
html {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-size: 15px;
  font-family: Microsoft YaHei;
  font-weight: 500;
  color: #000;
  overflow-x: hidden;
}
a {
  text-decoration: none;
}
ul li {
  list-style: none;
}
.clear-fix::after {
  clear: both;
  content: "";
  display: block;
  width: 0;
  height: 0;
  visibility: hidden;
}

.clear-fix {
  zoom: 1;
}
